Before posting your scholarly product for Open Access, or any version of it, you will need to check which and whether any permissions to do so have been granted by the publisher. Very often for scholarly articles, the work of finding those permissions has been done up front by the website SHERPA/RoMEO. The journal you published your article in, however, may not be indexed there. In that case, you need to contact the journal or its publisher. You bear the responsibility of ascertaining the permissions of the publisher and adhering to their instructions for posting your scholarly work. If your journal is indexed SHERPA/RoMEO, the following walk-through of the website will help you to answer the following:
Go to the SHERPA/RoMEO site to identify the journal that published the article. Enter the title or ISBN of the journal.
Identify Open Access permissions for your journal.
Identify Open Access pathways permitted by a journal's policy using the following icons.
OA Fee - This pathway has an Open Access fee associated with it
OA Publishing - This pathway includes Open Access publishing
Embargo - No Embargo
License (e.g., CC BY, CC BY-NC-ND)
Copyright Owner - Authors
Publisher Deposit (e.g., PubMed Central, Europe PMC)
Conditions - Published source must be acknowledged