ELM Computer Systems has been the Greater Toronto Area's best choice for custom software development since 1978. Whether our own AvanTax line of software and services (used by thousands of clients across North America) or a specialty application to help your business run more efficiently, we have the staff and the expertise to make your dream a reality.

We have developed systems for many platforms (Mobile, PC, Web and Mainframe) and are experts in VB, C#, HTML, ASP.Net, Javascript, Java, SQL Server, dBase, Access and Excel apps.

Though not our primary area of business at this time, we also offer end-to-end computer management services and provide an economical alternative to in-house computer staff.

Our technology specialists know IT.

Our History

ELM Computer Systems was established in 1978 by the accounting firm Norton McMullen & Co. LLP to provide a reliable team of technicians to service its own IT needs as well as the IT needs of its clients. Over the years our product offerings have adjusted to accommodate the growing computer expertise of our clients. Although we are currently more heavily involved in information services and software development, a number of our original clients continue to use us as their preferred IT solutions provider.

Our Staff

ELM Computer Systems' staff is centered around a highly skilled team of professionals whose skills have been developed over decades to cover almost every aspect of personal computing. The information below will provide some basic information on the principal members of our team.

Jim McDonald

Jim McDonald is the president of ELM Computer Systems Inc. and has been with the company since 1980. Jim is our primary contact for QuickBooks support issues and is a certified QuickBooks ProAdvisor. Jim maintains our popular AvanTax software (used by firms across North America to calculate automobile taxable benefits) and is actively involved in the development our flagship product, AvanTax eForms, as well as numerous custom programming & development projects.

416 495 1624 Ext. 109 / jim@elmcomputers.com

Stephen Simpson

Stephen Simpson has been with ELM since 1987 and is currently Project Manager for a number of our products; including: AvanTax eForms as well as a highly regarded data collection application running on Android phones and tablets that is used by field technicians monitoring environmental heating and cooling systems.

416 495 1624 Ext. 104 / ssimpson@elmcomputers.com

Peter Rhebergen

Peter Rhebergen was hired by ELM in 1991 as a programmer for our popular T4 TimeSaver software and now maintains AvanTax eForms. He is the primary technical support contact for AvanTax eForms and is the manager of our AvanTax Filing Services.

416 495 1624 Ext. 112 / peter@elmcomputers.com

Our Services

ELM  is a full service company providing comprehensive software development and computer management services to small and midsize businesses. We offer a viable alternative to off-the-shelf systems that may or may not address all the issues of concern to you and are fully capable of developing custom applications to suit your exact needs. 

We are also a cost-effective alternative to an in-house IT staff, whether installing and maintaining a network or removing viruses from a single computer.

Our Products

ELM provides a broad range of both hardware and software products to help you maintain a high level of productivity. We work with you to help maximize your existing equipment investment. As your company grows, we can quickly and accurately analyze your technology requirements and recommend cost effective solutions that will help increase your company's performance. 

Click on any image below this section to go to the appropriate product site.

AvanTax Auto

AvanTax Auto helps human resources staff and payroll managers quickly and accurately calculate and report automobile taxable benefits. One of AvanTax Auto's three versions is sure to suit your business needs perfectly, and data is easily rolled forward from one year to the next.

AvanTax eForms

Since 1987 ELM's AvanTax eForms has been Canada's outstanding tax slip preparation program. Our development team has worked with professional accountants from the very beginning to ensure that eForms saves time, reduces paper use and minimizes errors when producing CRA and Quebec information slips. Used by thousands of firms across North America, AvanTax eForms accurately and reliably produces returns for the most 'popular' federal and provincial information slips; including: T4, T4A, T5, T4A-NR, NR4, RL-1, RL-3, RL-31 returns and many more.

Versions of eForms are available to fit businesses of any size and each includes unlimited free technical support that is fast, friendly and courteous.

AvanTax Filing Services

First introduced in 2012, AvanTax Filing Services enables clients to offload processing of year end tax slips to any desired level. Our vast experience in processing Canadian tax returns means that you can rest easy, knowing that your data is in good hands and our full range of services means that you can have exactly what you want; whether that is a simple XML submission, full PDFs of many returns or email/print/mail of recipient slips.

Our Affiliations

We are also registered resellers of Dell desktops and notebooks; a Certified Microsoft Partner and a member of the QuickBooks ProAdvisor Program. These, along with other affiliations, allow us to offer our clients the absolute best in software development and support, as well as hardware sales and service.