Quoting directly from the CRA Netfile Error code 93 - here -
Chapter 2 EFILE Error Messages for 2017, 2018, 2019 and 2020
“There are rental and/or self-employment activities reported on the return and one of the following situations applies to your client's return:
No selected financial data (SFD) records were submitted.
The client is converting to a December 31 fiscal period and the sum of the net incomes/losses at field 9946 on the SFD statements minus any amount at line D on the Form T1139, does not equal the total income (or loss) reported at fields 126, 135, 137, 139, 141 and/or 143.
The client is using the alternative method (Part 2 of the Form T1139) and the sum of the net incomes/losses at field 9946 on the SFD statements, plus any amounts for additional business income at line G, minus any amount at line I, does not equal the total income (or loss) reported at fields 126, 135, 137, 139, 141 and/or 143.”
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