To import into Simply accounting, do the following

1. In Sumac, go to the Ledger Entries list. Search for the date range of entries you're interested in to find the list of entries to export. Under "Reports" click "Simply (Sage 50) Accounting" to run this report. Sumac will save this report to a file.
2. Once you've produced the report in Sumac, go to Simply/Sage.
3. Once there, go to File > Import > Import Transaction
4. Pick the format of Simply50 Accounting
5. Choose your file, and Simply will automatically import it and tie it to the contact that already exists in the accounting system.