subscription options and defaults

I am creating a subscription form, and have 2 questions:

1) How do I pre-fill data into a field? IE how can I pass an initial value?

2) I need to disable certain subscription options depending on a customer's usage. How can I pass this into the form and then disable options? Basically I can't have customers purchase subscriptions with limits lower than their current usage.

Thanks,
-Andreas

I see you've asked to quick generalized questions and I would be more then happy to respond to you here about that. However, For future questions or issues please keep them separate since this helps broading the knowledge within our forum when searched by other users. Anyhow...

1) How do I pre-fill data into a field? IE how can I pass an initial value?

Yes you can do this with pre-population. Please see our Population Generator which is found here: http://prepopulate.jotform.io/

2) I need to disable certain subscription options depending on a customer's usage. How can I pass this into the form and then disable options? Basically I can't have customers purchase subscriptions with limits lower than their current usage.

For something like that I would recommend a Multi-payment Form and some conditional logic to create that effect so that if someone doesn't meet certain criteria then they wouldn't be able to purchase certain options.

Thanks. I figured out how to pre-fill.

However, regarding the subscription options, using multi-form would mean I'd need to use many duplicates of the same form? Is my understanding correct? So if I have 5 subscription levels and want to ensure that people don't subscribe to a plan below their actual usage, I'd have to have 5 forms, all the same, except with decreasing number of options?

Thats correct. If the options are to be part of the items that will be calculated on the Payment Tool, you should have a payment tool form for each subscription level. All these forms should then be embedded to a "main" form,. and only the needed form will be shown by setting up conditional rules.

Do let us know if you need further assistance. Thank you.