What version are you on?  Are you paying maintenance.

Sage changed customer numbers a while back.  I had one client for the longest time that still needed to use the old number.

We are on the 5.40 version.

Previous management did not continue the maintenance option.

You are on version 2017 which does not support the updates for the 1099s.  You will need to get back on maintenance to be able to upgrade and get the needed settings.  Your version will not have the form or boxes for the NEC form.

You can use the standalone program from Aatrix found at https://www.aatrix.com/efile/ and it might let you import the information.

You would need to contact your Sage reseller or sales at Sage to get a new subscription to the software but if you don't keep the subscription your software goes read only.

Yes, the old license type (perpetual), has been discontinued and is what allowed going "off plan" while still using the software afterwards (but only on that version... no access to updates / upgrades). 

The new license type (subscription) doesn't allow going "off plan" in that way.  After a short grace period (45 days?) the software becomes read only, so it's impossible to renew for just one month...

Yes, the old license type (perpetual), has been discontinued and is what allowed going "off plan" while still using the software afterwards (but only on that version... no access to updates / upgrades). 

The new license type (subscription) doesn't allow going "off plan" in that way.  After a short grace period (45 days?) the software becomes read only, so it's impossible to renew for just one month...