Sorry but you can only efile 5 returns per the IRS. You shouldn’t have been able to in prior years but got around it by using different computers. Now they are enforcing 5 efiles by having you register the License Code in an Online account.
Buying another personal program won't get you more efiles. 5 Efiles is a IRS limit.
See IRS Handbook for Authorized IRS e-file Providers of Individual Income Tax Returns page 34 #4 and page 36 #2 for limit of 5 efile
https://www.irs.gov/pub/irs-pdf/p1345.pdf#page36
