Step-by-step instructions on merging 1099 vendor data from multiple productions to create accurate 1099 forms and IRS reports. Click on the file below to access the PDF form. Related articles PSL+: 1099-T4A User Guide Generating Forms and eFiles PSL+: Codes for NEC 1099 and MISC 1099 Forms PSL+: Check if You Have Access to PSL 1099 PSL+: 403 Error when trying to log into 1099 Project Center PSL+: How to Download and Review a Summary in PSL+