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Addsum Business Software, Inc.
TAS Premier and TAS Pro business and accounting computer software programming for commercial and custom applications

Publisher of Advanced Accounting and Addsum TAS Premier
Home of
Advanced Accounting 8 software
Sales, support, custom programming, add-ons, interfaces and training
Addsum TAS 7i Premier

The free PC database development tool

TAS Premier Developers Group

Mailing address:
P. O. Box 17284
Salt Lake City UT 84117

UPS/FedEx delivery and our physical address:
4836 South Highland Drive Suite #202
Salt Lake City UT 84117


We are located in the Creekside Place shopping/business center

Mobile site

Recommended local accommodations:

Crystal Inn MidValley (most economical, free airport shuttle, free local shuttle service, nice rooms)
Marriott Residence Inn Cottonwood (suites with separate rooms, very nice rooms, mountain views)
Telephone (local/support):
(801) 277-9240

Toll free (sales/info.) nos:
(888) 923-3786
(or 888-9-ADDSUM)
(800) 648-6258

Facsimile:
(801) 277-4220

E-mail:
info@addsuminc.com

Encrypted e-mail


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PLEASE NOTE: we do not outsource any of our support, programming or other business staffing needs.


ADDSUM® is a registered service mark of Addsum Business Software, Inc.
It was registered on October 31, 1995 under U.S. Registration Number 1931574.
The registration most recently was extended for an additional 10 years via
a Section 8 and 9 filing on October 18, 2025 which was formally accepted on January 23,2026
by the US Patent & Trademark Office. It now remains in force until October 31, 2035.


ADDSUM is a trademark of Addsum Business Software, Inc.
is a trademark and service mark of Addsum Business Software, Inc.
BUILT ON ACCOUNTING is a trademark of Addsum Business Software, Inc.

Copyright © 1996-2026 Addsum Business Software, Inc.
All Rights Reserved

2026 marks our 30th year of having an on-line presence. Our first web site was launched on March 28, 1996. Our mobile site was launched in May of 2013.