Unable to give player custom splash potion

Question

I'm trying to make a custom splash potion but whenever I give it to myself it gives me a splash uncraftable potion.

What am I doing wrong? The command I'm using is:

/give @p minecraft:splash_potion{tag:{CustomPotionEffects:[{Id:2,Amplifier:3,Duration:12000},{Id:4,Amplifier:10,Duration:12000},{Id:9,Amplifier:10,Duration:12000},{Id:15,Amplifier:10,Duration:12000},{Id:17,Amplifier:3,Duration:12000},{Id:18,Amplifier:10,Duration:12000},{Id:19,Amplifier:2,Duration:12000},{Id:20,Amplifier:1,Duration:12000}],display:{Name:"Potion Of Guilt"}}}

I am playing Minecraft 1.14.3

Answer 1

(This answer is obsolete as of the Minecraft 1.20.5 update)

The correct syntax for using the /give command with NBT does not include the tag tag.

/give @p minecraft:splash_potion{CustomPotionEffects:[{Id:2,Amplifier:3,Duration:12000},{Id:4,Amplifier:10,Duration:12000},{Id:9,Amplifier:10,Duration:12000},{Id:15,Amplifier:10,Duration:12000},{Id:17,Amplifier:3,Duration:12000},{Id:18,Amplifier:10,Duration:12000},{Id:19,Amplifier:2,Duration:12000},{Id:20,Amplifier:1,Duration:12000}],display:{Name:"Potion Of Guilt"}}