• Basic forms
• 納める — pay; put in; store / base form
• 納めます — pays; puts in / masu form
• 納めた — paid; put in / ta form
• 納めて — paying …; putting in … / te form
• 納めない — do not pay; do not put in / negative
• 納めれば — if (one) pays / conditional
• Common expressions
• 税金を納める — pay taxes
• 会費を納める — pay membership fees
• 箱に納める — put into a box
• More
• 納めたい — want to pay / 〜たい form
• 納めよう — let’s pay / 〜よう form
• 納めている — is paying; has paid / state

納める（おさめる） is an ichidan transitive verb. It means to pay (taxes or fees) or to put something properly into a place.

• Basic forms
• 納まる — be settled; fit; be stored / base form
• 納まります — is settled; fits / masu form
• 納まった — was settled; fit / ta form
• 納まって — being settled … / te form
• 納まらない — is not settled; does not fit / negative
• 納まれば — if (something) is settled / conditional
• Common expressions
• 話が納まる — the matter is settled
• 箱に納まる — fit into a box
• 感情が納まる — emotions settle down
• More
• 納まっている — is settled; is contained / state

納まる（おさまる） is a godan intransitive verb. It describes something becoming settled, fitting, or contained on its own.