Long time TaxAct user .... I import stock transactions into TaxAct from a spreadsheet. Easy once the format is set. I seem to recall that I initially downloaded a template from the TaxAct site, but can't find that link right now.
See this: https://www.taxact.com/support/881/2017/how-to-im[product key removed]mation-using-a-csv-file-from-y...
