TT 2017 did not carry spouse nondeduct IRA contributions basis forward to 2018. TT 2018 asked for explanation why the carryforward basis I entered did not match its record (which was $0). There was no basis used by spouse in 2017 or 2018 as all spouse RMD$ were covered by QCD. On the both 2017 and 2018 "IRA Information Worksheets" lines 1 showed the spousal beg basis amounts, but lines 3 (carryforward amount) showed $0. Neither year required a Form 8606 filing for the spouse as no additional basis was added and none was used.
