Institutional Review Board (IRB) approval is valid for a maximum period of one year, with limited exceptions specified in the Human Research Protection Program (HRPP) Manual Section 8-8, âDemonstration Projects.â The approval period will be listed on approval letters sent to researchers, including both the approval date and the expiration date.
Operational Hours: This number is valid from 7am to 10pm within your local time zone. IRS Phone Number for Taxpayers Living Abroad (International) â If you are calling about an issue with filing electronically contact the Austin Office at 512-416-7550 (7am to 6pm CST)..
IRS international customer service phone numbers and address: 1  International Taxpayer Service Call Center Phone Number: 267-941-1000. 2  Austin Customer Service Number: 512-416-7750 (not toll-free). 3  Puerto Rico IRS toll free Number: 1-800-829-1040. 4  Virgin Islands Customer Care Number: 1-800-829-1040.