General
Please visit https://www.pnas.org/author-center/after-acceptance#reprints for information about purchasing article reprints.
You may purchase print issues, journal covers, and journal cover posters from volume 115 (year 2018) to present. Earlier volumes are out of print, and no longer available for purchase.
Click on the "Log in" link on the top right of the home page to get to the login screen. Type your credentials into the "Username" and "Password" fields and click the "Log in" button to access your account.
After logging in, click on "My account". Click on the "Edit" tab. Type your current password into the "Current password" field, then type your new password in the "Password" and "Confirm password" fields and "Save".
Please use our "Contact" form for all technical-related questions. A representative will respond to your question within 24 hours.
A charge will immediately appear on your bank statement under the name "Sheridan".
We are unable to provide refunds or exchanges, as all products are made-to-order. Please double-check all order details before completing a purchase. If you need assistance with your purchase or there is some other issue with your printed materials, please use the Contact Us form.
In accordance with applicable law, we collect tax in all states. Sales tax is applied to the total amount of the order and is based on the shipment's destination state and local sales tax rates. Applicable sales tax is charged for electronically delivered products where required by local law. These items are considered to be shipped to the address that your order was billed to.
In accordance with applicable law, we collect tax in all states. Sales tax is applied to the total amount of the order and is based on the shipment's destination state and local sales tax rates. Applicable sales tax is charged for electronically delivered products where required by local law. These items are considered to be shipped to the address that your order was billed to.
If your order has been charged tax and you are a tax exempt organization we will refund the tax portion of your purchase if we receive the request and all necessary paperwork within 30 days after an order was placed. To apply for a refund of the tax portion of your order please follow the procedure below:
- Place your order.
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Forward a copy of the received invoice along with ta copy of your tax exempt certificate to:
- Email: estorecancel.sbi@sheridan.com - Attn: Tax Exempt
- Fax: 734.385.1689 - Attn: Tax Exempt
- Once your tax information is received, a refund will be issued for the taxes if the order meets the requirements for tax exemption.