So I'm building a second version of my subclass, the spellslinger (port of pathfinder class), and I have a class ability that will allow them to add their intelligence modifier to ranged (firearm) attacks. I can't seem to get it to recognize this on the character sheet, however. Is there a way to fix this? (I.e. My character uses the Bad News Rifle, and with their stats gets a +12 to hit, but if it adds their INT, it should be a +16. Can I get that to show on the sheet?)

Try this, it should work:

Make the subclass feature. As part of that feature, add the following Modifier. 

Modifier—>Bonus; Modifier Subtype—>Ranged Weapon Attacks; Ability Score—>Int

Save the subclass feature.

Re-save the whole subclass.

It might take a few minutes to push through to the character sheet, but that should your Int modifier to all Ranged Weapon Attacks made by the character.

I'm pretty sure I've done this, but I'll give it another go for sure. I was just tired and frustrated the other night. I'll let you know how it goes. Thanks!

Happy to help. Fingers crossed for you. Remember to re-save not just the modifier, but also the feature and the whole homebrew to trigger it to recheck for compliance.

Is this the same homebrew that’s giving you an issue about the Extra Attack feature?

It is. I believe the issue has been solved on both sides. Not sure what changed, I had been using the same modifiers before, but the extra attack has shown up, and it seems as though the stat addition has been added as well.

They said that the new character sheet framework is supposed to correct/eliminate the miscodes that occur (mistakes people make) with homebrew, or figure it out and make it work or something. Before, some mistakes could actually crash sections of the sheet, or even the whole thing, so this is supposed to prevent that. I think that process takes a bit. I took a Club and removed Light and added Heavy and Two-Handed and it took until this morning to register on the character sheet.

So it was already adding in the extra Modifier, my mistake I missed that, but it really took like a day (even after saving everything like you'd said earlier) for it to add the extra attack on the character sheet. I have a few other mods I'd ideally like to add, but likely won't because I'm so lost on a lot of how this all works.

Quote from TheWolfe >>

So it was already adding in the extra Modifier, my mistake I missed that, but it really took like a day (even after saving everything like you'd said earlier) for it to add the extra attack on the character sheet. I have a few other mods I'd ideally like to add, but likely won't because I'm so lost on a lot of how this all works.

 Funny you should mention that! I have just posted some tips for another user in this thread: https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/67139-help-with-homebrew#c1.

Since this has changed from “Bug/Support” to “How to Homebrew” that’s a better forum for the conversation anyway. 

Thanks! I'll take a look!

Happy to help