No, you cannot skip those 2 years. You are required to file based on the IRS filing requirements (please read the blue links) -not based on whether you have a refund or taxes owed... You can still file with TurboTax, but you will have download prior year software to do so, you can no longer do it online for prior years. You will also have to print and mail your tax returns.
This link here provides more details on filing if you don't owe tax.
