But by Oct. 1, 2020, every air traveler will need a Real-ID-compliant license, or another acceptable form of federal ID for domestic travel. The Real ID Act created a national standard for state-issued IDs. Some states initially refused to comply, fearing that the federal government would make a national database of citizens.It is clear that a U.S. passport will have increasing importance even for domestic travel. And the rise of the passport’s importance coincides uncannily with a new law giving the IRS power to revoke passports. Plainly, the easy answer to travel worries may be to dig out your passport, and they are already often in evidence in domestic air check in lines. But what if your passport is cancelled because you owe the IRS?