If you are trying to use the online program STOP. Online is for 2020 returns only--no other year.
If you want to file a 2018 tax return for free use the paper forms and prepare them by hand. It would cost you $80 to buy the software now.
2018 Form 1040, Schedules and Instructions
https://www.irs.gov/pub/irs-prior/f1040--2018.pdf
https://www.irs.gov/pub/irs-prior/i1040gi--2018.pdf
2018 Tax and EIC Tables https://www.irs.gov/pub/irs-prior/i1040tt--2018.pdf
IRS 2018 Schedules 1 thru 6 (only if needed)
Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2018.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2018.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2018.pdf
Sch 4 : https://www.irs.gov/pub/irs-prior/f1040s4--2018.pdf
But----what kind of income did you receive in 2018? Was it self-employment income? Or did you get a W-2 with tax withheld that you are hoping to get back? Why are you filing a tax return if you only had $800 of income that year? Did someone else claim you as a dependent? If you were someone else's dependent you are not going to get a stimulus check based on filing that 2018 return.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
