The rule to select Profession
- Planet/Planets posited in the 10th house.
- 10th lord.
- Lord of Navamsha, occupied by the Lord.
- Lagna is the Lord of Dasamsha.
The strongest planet gives the final results. If there is more than one strong planet, then there will be a blending of influences from all such planets, and even more than one profession may be adopted.

Sir, Pls check 3rd and 4th point is not clear.
I agree. 3rd and 4th point should be clarified.
So my understanding is:
1. At D1 chart = planets sitting on 10th house
2. At D1 chart = 10th house lord
3. At D9 chart = 1st house lord and house placement
4. At D10 = 1st house lord
So in my case:
1. no planets (Libra)
2. Venus with Jupiter 1st house Capricorn
3. Mars with Saturn 9th house Sagittarius
4. Jupiter with Saturn 6th house Taurus
Points
Sun: 0
Moon: 0
Venus: 2
Mercury: 0
Jupiter: 1 + 2 = 3
Mars: 2
Saturn: 1 + 1 = 2