You cannot put 2018 and 2019 income on the same tax return --- if you did that it is a big mistake. Did you e-file it---are or we catching you in time to stop you from making a mistake?
The online software program is ONLY for 2019 income -- no other year. If you had 2018 income it needs to be filed a 2018 tax return form which has to be mailed in. 2018 cannot be e-filed.
Post back and tell us what you did.