No, you will be able to e-file, but I think you are getting the PINs confused. There is an e-filing pin, that only you know (5 digit number you chose last year if you e-filed). If you filed with TurboTax last year, the pin will be there, saved when you go to e-file. There is one for you and your spouse - dependents don't have e-filing pins (Self-Select PIN) - you and your spouse will choose a new 5-digit pin when you file this year also. And for this pin, you can use the same one you used last year, it doesn't matter.
The other PIN is the IRS-issued IP PIN. You get a CP01A letter each year for these PINS and they get entered on your tax return. To enter this pin (one for you and your adult child), see this link. Not everyone has an IP PIN, but if the IRS sent you one (and your child), you must enter both of them on the tax return in order to e-file. If you don't enter them, your return will get rejected. But if this happens, you can go back and add it/them and re-submit your return. You and your dependent will get a new letter next year with a new IP PIN from the IRS.
IP PIN vs. Self-Select PIN
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