e-Filing more than 5 federal returns

I buy TurboTax Home & Business every year so I can file the federal returns for me/my wife, our 3 boys and my elderly, widowed Mom. This year, I unexpectedly have another federal return to file for my mother-in-law who moved into assisted living in January 2023. My wife has a DPOA for her Mom and was able to get copies of all the 1099's and SSA forms that my MIL never received with her mail interruption so I could prepare her 2022 return, which I previously filed an extension for. Today, as I was preparing to file my MIL's federal return, TurboTax had a warning message that I have "hit my 5-federal-return limit" and will need to print and file my MIL's return. But I want to electronically file. Should I purchase another desktop download of TurboTax (i.e., Deluxe) so I can file electronically, or is there another, better way to handle this?