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Keystone will respond within 3 business days to standard questions or inquiries. Uploaded documents will be processed in our normal workflow. Please allow additional time for handling.

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Do you need to send Keystone documents?

Use our convenient e-file service and select DocAttach^SM to send us your documents.

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Use Keystone e-Pay to send us documents. Have your invoice number available.

Do you need to send Keystone documents?

Log on to Keystone's Business Portal to file your return.

Do you need to send Keystone documents?

Log on to Keystone's Business Portal to file your return.

Do you need to send Keystone documents?

Use Keystone e-Pay to send us documents. Have your invoice number available.

Do you need to send Keystone documents?

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Only complete this section if your inquiry requires a response to a question or additional follow up.

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Files

You may upload up to 10 files at up to 10MB each. Accepted file types are TIFF, TIF, PDF, JPEG, JPG, and PNG.

To ensure proper handling, include a copy of the bottom portion of the Document Request Notice when uploading documents.

Make sure the "Amended Return" box is checked on the final return you are uploading.

Click Browse to upload file 1