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

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

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