I have imported the NV1_NV2 fiel using 2.20.2 and the Government Totals report does not appear and the IH PE and IE accounts do not appear in the employees payroll records.
I suspect that the problem in 2.20.0 was with the T4A boxes that was fixed in 2.20.2. NV2 had two digit T4A box numbers prior to 2.20.0 and 2.20.0 requires three digit box numbers.
Sorry for any inconvenience.
Regards to All,