Mailing Addresses

Office Listing

Frequently Asked Questions

Online Inquiry

If you have any questions or would like further information, please use the convenient form provided below. Please do not send social security numbers or other sensitive information.

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Mailing Addresses

Do not mail tax forms or payments to a local office.
Click here to find the mailing address you need.

Office Listing

You may also contact us at one of our local offices.

Keystone Collections Group
Phone (724) 978-0300
Fax (724) 978-0339

Frequently Asked Questions


Taxpayer Helpline

1-888-328-0565

At Keystone, we value your time. Avoid hold times when tax-season call volume is high by contacting our Taxpayer Services team online. Please submit your question using our Online Inquiry form on the left side of this screen.

A Taxpayer Services Representative will respond to your inquiry within 3 business days.

Thank you for contacting Keystone Collections Group.