After inputting my data through Easy Steps, my T4A amounts were in second column of "Forms-T4A" table. I found that by moving data to first column (which was empty), tax then became eligible for transfer. Then digging around a bit more, I found that for T4 form, data was in first column of the table. If I move the tax deducted amount to second column, it too then becomes eligible for transfer. All a bit kludgy! Not sure why it would matter which column data is in in the forms table!
