The bonds present in [Cu(NH₃)₄] SO₄ between copper and ammonia are

$\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]{\mathrm{SO}}_4$

${\left[\mathrm{Cu}{\left({\mathrm{NH}}_3\right)}_4\right]}^{+2}{\mathrm{SO}}_4^{-2}$

Bond between cationic complex and sulphate ion is ionic (electrovalent)

Four dative bonds are formed between Cu⁺² ion and four ammounia molecules .

In ammonia molecule covalent bonds are present between Nitrogen atom and Hydrogen atom.