STOP! You cannot use the online software for any tax year except 2019. You cannot change it to file for 2013. In fact, software is no longer even available for a 2013 tax return and you are way too late to get a refund for a 2013 return. If you owe tax due for 2013 the IRS still wants to be paid though--with interest and penalties.
If you want to file a 2013 return, get the forms from the IRS and prepare them on paper by hand.
@VolvoGirl Do you still have 2013 forms?
Here are some blank forms & instructions for 2013
2013 Tax Tables http://www.irs.gov/pub/irs-prior/i1040tt--2013.pdf
Publication 17 Tax Guide for 2013 http://www.irs.gov/pub/irs-prior/p17--2013.pdf