Need help with a macro and it is probably simple ...

I'm looking for something that will automatically determine hit or miss and deduct damage to tokens/character hit points. Seems like maybe this is so basic no one is asking about it. It isn't showing up in my searches. I'm new at this and appreciate any help. Thanks.

It probably exists, but honestly, every game I've played in my 2 years of playing on Roll20, we do the old fashioned way, " does a 17 hit? It does, okay then apply 8 damage to your character."  if you have the tokens assigned correctly with hit points and such, all you have to do is click the bubble over the token that represents hit points and type -8 and enter and it will deduct 8 hp from the character sheet.

You can use the chatSetAttr or TokenMod scripts for this. The first changes attributes on the character sheet, the second changes properties of tokens - and if the token bubbles are linked to character attributes, will change those.

Thanks. I've downloaded TokenMod and was having trouble with it. I will give it another shot.  Patrick, It seems like I have so many monsters that it slows things down when I have to click and change each hp change. 

A huge help is group check, with the  Apply Damage   helper script installed. You can roll saves and apply damage accordingly for a whole group of tokens.

I also am looking to do this. It's actually what I pictured using Roll20 would be like out of the box. Choose your attack (Greataxe, Longsword, Mace, etc) Choose your target Automatically determine a hit and deduct damage from the target I'm trying to put it together myself but I'm still learning so it's slow going. I'm surprised I haven't found anything that someone else has done already, though.

David, is your GM a Pro subscriber? For step 3 in your list, you need to use API scripts, which require the GM to be a Pro user. Normal macros cannot only display results of rolls - they cannot change values on a character sheet.

I am the GM. I have another account that has the Pro membership.