Nearly 2 million Individual Taxpayer Identification Numbers (ITINs) are set to expire at the end of 2019 as the Internal Revenue Service continues to urge affected taxpayers to submit their renewal applications early to avoid refund delays next year.

Despite the government shutdown, the Internal Revenue Service confirmed that it will process tax returns beginning January 28, 2019 and provide refunds to taxpayers as scheduled.

Plan ahead. Delivery times for online and phone orders typically take five to 10 days from the time the IRS receives the request. Taxpayers who order by mail should allow 30 days to receive transcripts and 75 days for tax returns.