This enhancement was released in the following Sage 100 versions (Spring, 2021):
If you had been updating Purchase Order Invoices with 1099 Misc Box 7 as the workaround before the above versions, after upgrading, run ONLY the AP_1099Misc7_Utl to change the default 1099 form, create records and move the data from 1099 Misc Box 7 to 1099 NEC Box 1 in Vendor Maintenance, Additional Tab, 1099 History. Open the ../MAS90/Utility/AP_1099Misc7_utl.docx or .pdf for instructions on running this utility. This utility can be found on kb 103480 linked in related resources below.
This feature was added as a result of a Sage City Ideas Enhancement Request 1099 NEC needs to be added to Purchase Order module