Hopefully you saved the receipts

That tax man cometh to National Semiconductor.

In a 10-K filed on Thursday, the Sunnyvale company noted that the IRS has been auditing its tax returns for the fiscal years running from 1997 to 2000. The IRS has decided National owes another $19.1 million (not including interest). National begs to differ and is appealing through the IRS administrative process.

Even if it loses, the company says it won’t have a material affect.