I think I can help with your question. It's always good to start by memorizing the chord qualities in your major and minor scales. Remember that we use Roman Numerals to represent the order of chords in a scale.
Major Scale Chords: Imaj7 II-7 III-7 IVmaj7 V7 VI-7 VII-7b5
C Major Scale Chords: Cmaj7 D-7 E-7 Fmaj7 G7 A-7 B-7b5
Minor Scale Chords: I-7 II-7b5 IIImaj7 IV-7 V-7 VImaj7 VII7
A Minor Scale Chords: A-7 B-7b5 Cmaj7 D-7 E-7 Fmaj7 G7
Using this guide, you can determine which chord quality (maj, min, dim, or aug) to use with a given note of the scale. I hope that helps!